Fuel-feeding apparatus.



No, 730,883. PATENTED JUNE 16, 1903.

L. K. DAVIS.

FUEL FEEDING APPARATUS.

APPLIOATIQN FILED MAR. 12, 1902.

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No. 730,883. PATENTED JUNE 16, 1903.- L. K. DAVIS.

. FUEL FEEDING APPARATUS.

APPLI OATION FILED MAR 12, 1902 UNITED STATES Patented June 16, 1903.

PATENT ()FFICE.

LEWIS K. DAVIS, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO GRAOE P. DAVIS, OF INDIANAPOLIS, INDIANA.

'FUEL-F'EEDING APPARATUS.

:ZPE(3JIFFIATIQII forming part of Letters Patent No. 730,883, dated June 16, 1903.

Application filed March 12, 1902. Serial No. 97,878. (No model.)

To a whom, it may concern;

Be it known that I, LEWIS K. DAVIS, of Indianapolis, Indiana, have invented new and useful Improvements in Fuel-Feeding Apparatus, of which the following is a specification.

My invention relates to furnaces for burning fine fuel, as coal or coke, coal-dust, and the like, and to fuel-feeding apparatus therefor- The object of my invention is to provide a furnace in which the combustion of the fine fuel is complete, thereby obtaining a high degree of efliciency, and in which the fuel is evenly distributed in the combustion-chamber by means of fuel-feeding apparatus.

My invention consists in means ,for carry-.

ing out the above objects; and it further consists in the apparatus and devices having the general mode of operation substantially as hereinafter more fully described and shown in the accompanying specification and drawings, in which- Figure 1 is a side View, partly in section,

of my improved apparatus for burning fine fuel. Fig. 2 is a sectional view taken on the line a: a; of Fig. 1, and Fig. 3 is a sectional view on line :1 y of Fig. 1.

Referring to the drawings, a represents a furnace for burning fine fuel constructed according to my invention, while 1) represents a fuel-feeding apparatus, shown in this-instance as of the character fully disclosed in my pending application, Serial No. 97,877, filed March 12, 902. While the fuel-feeding apparatus described in the application referred to is suitable for use in connection with any furnace to which it may be pplicable, I have devised a furnace which when used with the fuel-feeding apparatus described in the application referred -to and illustrated in the present application will produce a complete combustion of the fuel, thereby obtaining the utmost degree of heat with a given consumption of fuel. The fuel-feeding apparatus referred to is provided with a nozzle 0, to which fluid under pressure is led for discharging thefuel therefrom, and this nozzle is so arranged that its angle of discharge may be varied, thus directing the fuel to any part of the combustion-chamber 1 of the furnace, while the nozzle 0 may be adjusted vertically as a whole, or, in other words, it may be bodily raised and lowered at the entrance to the furnace. The fuelfeeding apparatus is shown as arranged at the front of the furnace, where it should be placed in a furnace of the character described,

but with other furnaces or with a different of which there may be any desired number,

the convenient number being illustrated in Fig. 2 and placed at about the proper distance.

The bottom portions 6 and 7 of the combustion-chamber 1 and flue 3 preferably slope backward from the front of the furnace, as shown, this construction aiding in the operation ofthe apparatus, as hereinafter described. v

The bridge4=is preferably arched,-as shown, and projects toward the front of the furnace and above the level of the highest portion of the bottom 7 of the flue 3, while beneath the bridge I prefer to arrange a pocket or hollowed portion 8, communicating with the combustion-chamber 1. This pocket or hollowed portion 8 may be of any suitable shape and of any desired depth, a convenient shape being that illustrated in the drawings. The bottom of-the flue 3, as shown, is also provided with twyers 9, and fluid under pressure is led to the twyers 5 and 9 by suitable con nections ortpiping 1O. By the arrangement of. twyers as shown a blast of fluid under pressure, as compressed air, is discharged into the combustion-chamber and toward the front of the furnace at an upward angle, while fluid under pressure is also discharged from the twyers 9 at a point just beyondthe bridge 4, this second line of twyers 9 being auxiliary in action and assuringa complete combustion of the fuel, if that has not already taken place in the combustion-chamber 1.

A fuel-feeding apparatus 12 having been fully disclosed in my application hereinbev of the piping.

fore referred to but a brief description will be given here of its construction and operation, it being sufficient to state that a rifled nozzle 0 for injecting fluid under pressure and fuel into the furnace is connected to telescoping piping d by means of a universal joint or connection 19, this universal joint being formed by a spherical portion of the piping and a socket-piece f, connected to the nozzle and adapted to the spherical portion Suitable arms 3, connected to the socket f, provided with means for adjusting the same, allow the angle of discharge of the nozzle to be varied within the desired limits at will. The piping cl, as stated, is telescopic in order to allow the vertical height of the nozzle to be changed, and, as shown, the portion j of the piping is connected by struts Z to a sliding plate g, supported on slides 70, arranged on the front of the furnace. Fuel is fed to the nozzle 0 through a suitable hopper a: and through the piping d, while fluid under pressure, as compressed air or oil, is led to the nozzle by means of the flexible hose 0.

In the operation of the furnace and the apparatus for feeding fuel thereto the stream of fuel discharging from the nozzle is first directed against the wall of the hollowed portion 8 beneath the bridge 4, the nozzle 0 being then substantially in the position relative to the bridge as shown in Fig. 1, and then the nozzle is raised bodily until it is discharging injecting fuel directly into the path of discharge of the twyers 5, when it will be readily seen that a very complete combustion of the fuel will be had, while any portion of the fuel which is not burned at any point substantially in front of and above the outlet of the twyers 5 will be burned through the action of the twyers 9, arranged just beyond the bridge. The rifling, as described, given to the nozzle 0 produces a whirling motion of the fuel as it leaves the nozzle, tending to spread the same, and thus an even distribution and regulation is obtained, and this spreading of the fuel further aids in combustion in conjunction with the entering stream of fuel under pressure from the twyers 5 and 9.

I have found that with the arrangement of f uel-feeding apparatus described and furnace constructed as set forth every part of the combustion-chamber l is heated to a most intense degree and complete combustion takes place.

Without limiting myself to the precise details of construction hereinbefore shown and 2. In a furnace having a combustion-chamher, a flue and a bridge between them, the combination of adjustable means for feeding fine fuel under pressure into the chamber toward the flue, and means for injecting fluid under pressure through the bridge into the chamber and toward the fuel-feeding apparatus and simultaneously into the flue in rear of the bridge, substantially as set forth.

3. In a furnace having a combustion-chamber, a flue and a bridge between them, the combination of means for feeding fine fuel under pressure into the chamber at its front end and toward the flue, means for injecting fluid under pressure upwardly through the bottom of the flue behind the bridge, and means for injecting fluid under pressure through the bridge into the chamber in a direction away from the flue and toward the front of the chamber, substantially as set forth.

4. The combination of a furnace, its combustion chamber, a forwardly projecting arched bridge at its rear end having a hollowed portion beneath the same and provided with twyers for injecting fluid into the combustion-chamber toward its front end, and a finefuel-feeding device at the front end of the combustion-chamber and provided with means for directing its discharge into the fu rnace at any desired angle toward said bridge, substantially as described.

5. The combination of a furnace, its combustion-chamber, an arched bridge at its rear end provided with twyers discharging toward the front of the furnace, a hollowed portion beneath the bridge connecting with the combustion-chamber, a universal adjustable fuelfeeding device for directing fine fuel, first against the bridge and then into the lineof discharge of the twyers, substantially as described. Signed this 27th day of February, 1902, at Indianapolis.

LEWIS K. DAVIS.

Witnesses:

EDWARD O. LEIBLE, CLEMENS BLANK. 

